package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealDishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

/**
 * @FileName DishServiceImpl
 * @Description
 * @Author Sword
 * @date 2024-02-29
 **/

@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private SetmealDishService setmealDishService;

    /**
     * 新增菜品,同时保存对应的口味数据
     *
     * @param dishDto
     */
    @Transactional
    @Override
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);

        Long dishDtoId = dishDto.getId(); //菜品id

        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();

        flavors = flavors.stream().map(item -> {
            item.setDishId(dishDtoId);
            return item;
        }).collect(Collectors.toList());

        //保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);

    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     *
     * @param id
     * @return
     */
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品基本信息，从dish表中查询
        Dish dish = this.getById(id);
        DishDto dishDto = new DishDto();

        BeanUtils.copyProperties(dish, dishDto);

        //查询当前菜品对应的口味信息，从dish_flavor表中查询
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId, dish.getId());
        List<DishFlavor> list = dishFlavorService.list(queryWrapper);

        dishDto.setFlavors(list);
        return dishDto;
    }

    /**
     * @param dishDto
     */
    @Transactional
    @Override
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);

        //清理当前菜品对应的口味数据--dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId, dishDto.getId());
        dishFlavorService.remove(queryWrapper);

        //再添加当前提交过来的口味数据--dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();

        flavors = flavors.stream().map(item -> {
            item.setDishId(dishDto.getId());

            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);
    }

    @Transactional
    @Override
    public void deleteWithFlavor(List<Long> ids) {
        //添加查询条件,根据ids进行查询套餐表
        LambdaQueryWrapper<SetmealDish> setmealDishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setmealDishLambdaQueryWrapper.in(ids != null, SetmealDish::getDishId, ids);
        int setmealDishCount = setmealDishService.count(setmealDishLambdaQueryWrapper);

        //查询当前菜品是否关联了套餐,如果已经关联,抛出异常
        if (setmealDishCount > 0) {
            throw new CustomException("删除失败,该菜品关联了套餐");
        }

        //查询当前菜品售卖状态
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.in(ids != null, Dish::getId, ids);
        List<Dish> list = this.list(dishLambdaQueryWrapper);

        for (Dish dish : list) {
            //判断菜品售卖状态
            if (dish != null && dish.getStatus() == 1) {
                throw new CustomException("删除失败,该菜品正在售卖");
            }
        }

        //经过校验没有关联并且是停售状态删除菜品
        //1.删除菜品关联的口味
        //查询与菜品关联的口味
        LambdaQueryWrapper<DishFlavor> dishFlavorLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishFlavorLambdaQueryWrapper.in(DishFlavor::getDishId, ids);
        dishFlavorService.remove(dishFlavorLambdaQueryWrapper);
        //2.删除菜品
        this.removeByIds(ids);
    }
}
